Data Sheet
Janu ary 26, 201 1
QBK020A Series Power Modules; DC-DC Converters
36-55 Vdc Input; 12Vdc Output; 20A Output Current
ISO is a registered trademark of the International Organization of Standards
** UL is a registered trademark of Underwriters Laboratories, Inc.
† CSA is a registered trademark of Canadian Standards Association.
‡ VDE is a trademark of Verband Deutscher Elektrotechniker e.V.
Document No: DS03-077 ver. 1.46
PDF Name: qbus-qbk020a.pdf
§ This product is intended for integration into end-use equipment. All of the required procedures of end-use equipment should be followed
Features
Compliant to RoHS EU Directive 2002/95/EC (-Z
versions)
Compliant to ROHS EU Directive 2002/95/EC with
lead solder exemption (non-Z versions)
Exceptionally High power density: 173 W/in3
High efficiency – 94% at 12V full load
Thermal Performance: 8A at 70ºC at 1m/s (200LFM)
Delivers up to 20A output current
Low output ripple and noise
Industry standard Quarter brick:
57.9 mm x 36.8 mm x 10.6 mm
(2.28 in x 1.45 in x 0.42 in)
Cost efficient open frame design
Single optimal regulated output
Narrow input voltage range
Positive Remote On/Off logic
Output over current/voltage protection
Over temperature protection
Wide operating temperature range (-40°C to 85°C)
ISO* 9001 certified manufacturing facilities
Complies with and is licensed for Basic Insulation
rating per EN60950-1
UL** 60950-1 Recognised, CSA† C22.2 No. 60950-
1-03 Certified, and VDE‡ 0805 (IEC60950, 3rd
Edition) Licensed
CE mark meets 2006/95/EC directive§
Applications
Distributed power architectures
Intermediate bus voltage applications
Servers and storage applications
Networking equipment
Options
Negative Remote On/Off logic
Active load sharing (Parallel Operation)
Baseplate option (-H)
Auto restart after fault shutdown
Description
The QBK-series dc-dc converters are a new generation of DC/DC power modules designed to support 12Vdc
intermediate bus applications where multiple low voltages are generated using discrete/modular point of load (POL)
converters. The QBK series provide up to 20A output current in an industry standard quarter brick, which makes it an
ideal choice for small space, high current and 12V intermediate bus voltage applications. The converter incorporates
synchronous rectification technology and innovative packaging techniques to achieve ultra high efficiency reaching
94% at 12V full load. The ultra high efficiency of this converter leads to lower power dissipation such that for most
applications a heat sink is not required. The QBK series power modules are isolated dc-dc converters that operate
over a narrow input voltage range of 36 to 55 Vdc and provide single optimal regulated output. The output is fully
isolated from the input, allowing versatile polarity configurations and grounding connections. Built-in filtering for both
input and output minimizes the need for external filtering.
This product is affected by a Permanent Injunction entered by the United States District Court for the Eastern District of
Texas, Marshall Division in Civil Action No. 2:07-cv-00497-TJW-CE (copy enclosed). As set forth in that Order, certain acts
associated with this product are prohibited. This Product is Not for Sale in, Use in, or Importation into the United States.
RoHS Compliant
Data Sheet
Januar
y
26, 2011 QBK020A Series Power Modules; DC-DC Converters
36
–
55
V
dc In
p
ut; 12Vdc Out
p
ut; 20A Out
p
ut Current
LINEAGE POWER 2
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are
absolute stress ratings only, functional operation of the device is not implied at these or any other conditions in
excess of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for
extended periods can adversely affect device reliability.
Parameter Device Symbol Min Max Unit
Input Voltage*
Continuous VIN -0.3 55 Vdc
Non- operating continuous VIN -0.3 75 Vdc
Operating Ambient Temperature All TA -40 85 °C
(See Thermal Considerations section)
Storage Temperature All Tstg -55 125 °C
I/O Isolation Voltage (100% factory Hi-Pot tested) All 1500 Vdc
* Input over voltage protection will shutdown the output voltage when the input voltage exceeds threshold level.
Electrical Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions.
Parameter Device Symbol Min Typ Max Unit
Operating Input Voltage VIN 36 48 55 Vdc
Maximum Input Current IIN,max - - 8.5 Adc
(VIN=0V to 60V, IO=IO, max)
Inrush Transient All I2t - - 1 A2s
Input Reflected Ripple Current, peak-to-peak
(5Hz to 20MHz, 12μH source impedance; VIN= 48V,
IO= IOmax ; see Figure 9)
All - 30 - mAp-p
Input Ripple Rejection (120Hz) All 55 - dB
CAUTION: This power module is not internally fused. An input line fuse must always be used.
This power module can be used in a wide variety of applications, ranging from simple standalone operation to an
integrated part of sophisticated power architecture. To preserve maximum flexibility, internal fusing is not included,
however, to achieve maximum safety and system protection, always use an input line fuse. The safety agencies
require a normal-blow fuse with a maximum rating of 12 A (see Safety Considerations section). Based on the
information provided in this data sheet on inrush energy and maximum dc input current, the same type of fuse with a
lower rating can be used. Refer to the fuse manufacturer’s data sheet for further information.
Data Sheet
Januar
y
26, 2011 QBK020A Series Power Modules; DC-DC Converters
36
–
55
V
dc In
p
ut; 12Vdc Out
p
ut; 20A Out
p
ut Current
LINEAGE POWER 3
Electrical Specifications (continued)
Parameter Device Symbol Min Typ Max Unit
Output Voltage Set-point
(VIN=VIN,nom, IO=15A, Ta =25°C) All VO, set 12 Vdc
Output Voltage
(Over all operating input voltage, resistive load,
and temperature conditions until end of life)
VO 11.4 12.6 Vdc
Output Regulation
Line (VIN=VIN, min to VIN, max) All
0.2 2 %Vo
Load (IO=IO, min to IO, max) All
3 5 %Vo
Temperature (TA = -40ºC to +85ºC) All 150 mV
Output Ripple and Noise on nominal output
(VIN=VIN, nom and IO=IO, min to IO, max)
RMS (5Hz to 20MHz bandwidth) All 100 130 mVrms
Peak-to-Peak (5Hz to 20MHz bandwidth) All 140 200 mVpk-pk
External Capacitance All CO, max 0 10,000 μF
Output Current All Io 0 20 Adc
Output Current Limit Inception All IO, lim 23 Adc
Efficiency
VIN=VIN, nom, TA=25°C
IO=IO, max , VO= VO,set
All η
94
%
Switching Frequency fsw 300 kHz
Dynamic Load Response
(dIo/dt=1A/10s; Vin=Vin,nom; TA=25°C; Tested
with a 10 μF aluminum and a 1.0 μF tantalum
capacitor across the load.)
Load Change from Io= 50% to 75% of Io,max:
Peak Deviation
Settling Time (Vo<10% peak deviation)
All Vpk
ts
__
2
200
__
mV
s
Load Change from Io= 75% to 50% of Io,max:
Peak Deviation
Settling Time (Vo<10% peak deviation)
Vpk
ts
__
__
2
200
__
mV
s
Data Sheet
Januar
y
26, 2011 QBK020A Series Power Modules; DC-DC Converters
36
–
55
V
dc In
p
ut; 12Vdc Out
p
ut; 20A Out
p
ut Current
4 LINEAGE POWER
Isolation Specifications
Parameter Symbol Min Typ Max Unit
Isolation Capacitance Ciso 2000 pF
Isolation Resistance Riso 10 MΩ
General Specifications
Parameter Device Min Typ Max Unit
Calculated MTBF (IO=80% of IO, max, TA=40°C,
airflow=1m/s(200LFM)) All 1,535,000 Hours
Weight 41 (1.45) g (oz.)
Data Sheet
Januar
y
26, 2011 QBK020A Series Power Modules; DC-DC Converters
36
–
55
V
dc In
p
ut; 12Vdc Out
p
ut; 20A Out
p
ut Current
LINEAGE POWER 5
Feature Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions. See Feature Descriptions for additional information.
Parameter Device Symbol Min Typ Max Unit
Remote On/Off Signal Interface
(VIN=VIN, min to VIN, max , Signal referenced to VIN-
terminal)
Negative Logic: Device code suffix “1”
Logic Low = module On, Logic High = module Off
Positive Logic: No device code suffix required
Logic Low = module Off, Logic High = module On
On/Off Thresholds:
Remote On/Off Current – Logic Low All Ion/off 5 10 15 μA
Logic Low Voltage All Von/off 0.0 0.8 V
Logic High Voltage – (Typ = Open Collector) All Von/off 2.0 5.0 V
Logic High maximum allowable leakage current
(Von/off = 2.0V) All Ion/off 6.0 μA
Maximum voltage allowed on On/Off pin All Von/off 14.0 V
Turn-On Delay and Rise Times
(IO=IO, max)
Tdelay,
Enable with
Vin
Tdelay = Time until VO = 10% of VO,set from either
application of Vin with Remote On/Off set to On or
operation of Remote On/Off from Off to On with Vin
already applied for at least one second.
All 16 ms
Tdelay,
Enable with
on/off
1 ms
Trise = time for VO to rise from 10% of VO,set to 90%
of VO,set. Trise 1 ms
Output Overvoltage Protection (Clamp) All 13
15 V
Overtemperature Protection All Tref 125 °C
(See Feature Descriptions)
Input Undervoltage Lockout
Turn-on Threshold 35 36 V
Turn-off Threshold 32 34 V
Data Sheet
Januar
y
26, 2011 QBK020A Series Power Modules; DC-DC Convert ers
36
–
55
V
dc In
p
ut; 12Vdc Out
p
ut; 20A Out
p
ut Current
6 LINEAGE POWER
Characteristic Curves
The following figures provide typical characteristics for the QBK020A (12V, 20A) at 25ºC. The figures are identical for
either positive or negative Remote On/Off logic.
INPUT CURRENT, Ii (A)
0
1
2
3
4
5
6
7
8
30 35 40 45 50 55
Io= 20A
Io= 10A
Io= 0A
On/Off VOLTAGE OUTPUT VOLTAGE
VON/OFF(V) (5V/div) VO (V) (5V/div)
INPUT VOLTAGE, VO (V) TIME, t (1 ms/div)
Figure 1. Typical Input Characteristic at Room
Temperature. Figure 4. Typical Start-Up Using Remote On/Off,
negative logic versi on show n.
EFFCIENCY, η (%)
70
75
80
85
90
95
100
0 5 10 15 20
Vin= 36V
Vin= 48V
V in= 55V
OUTPUT CURRENT OUTPUT VOLTAGE
IO (A) (5A/div) Vo (V) (500mV/div)
OUTPUT CURRENT, IO (A) TIME, t (100 μs/div)
Figure 2. Typi cal Conv erter Effici ency Vs. Output
current at Room Temperature. Figure 5. Typical Transie nt Response to Step change
in Load from 50% to 75% of Full Load at Room
Temperature and 48 V dc Input .
OUTPUT VOLTAGE,
VO (V) (100mV/div)
OUTPUT VOLTAGE, OUTPUT CURRENT
(V) (200mV/div) IO (A) (5A/div)
TIME, t (2.5s/div) TIME, t (500 μs/div)
Figure 3. Typical Output Ripple and Noise at Room
Temperat ure and Io = Io,max. Figure 6. Ty pical Transient Re sponse to Step Change
in Load from 75% to 50% of Full Load at Room
Temperature and 48 V dc Input .
36 Vin
48 Vin
55
Data Sh ee t
Januar
y
26, 2011 QBK020A Series Power Modules; DC-DC Converters
36
–
55
V
dc In
p
ut; 12Vdc Out
p
ut; 20A Out
p
ut Current
LINEAGE POWER 7
Characteristic Curves (continued)
.
OUTPUT VOLTAGE, VO (V)
11.85
11.9
11.95
12
12.05
12.1
12.15
12.2
12.25
36 41 46 51 56
Io= 0A
Io= 10 A
Io= 20A
INPUT VOLTAGE, Vin (V)
Figur e 7. Ty pi c al Ou tpu t volt a ge re g ul a tion vs. Inpu t
voltage at Room Temperature.
OUTPUT VOLTAGE, VO (V)
11.5
11.6
11.7
11.8
11.9
12
12.1
12.2
12.3
0 5 10 15 20
Vin= 36V
Vin= 48V
V in= 55V
OUTPUT CURRENT, IO (A)
Figure 8. Typical Output voltage regulation Vs. Output
current at Room Temperature.
Data Sheet
Januar
y
26, 2011 QBK020A Series Power Modules; DC-DC Convert ers
36
–
55
V
dc In
p
ut; 12Vdc Out
p
ut; 20A Out
p
ut Current
8 LINEAGE POWER
Test Configurations
Note: Measure input reflected-ripple current with a simulated
source inductance (LTEST) of 12 µH. Capacitor CS offsets
possible battery impedance. Measure current as shown above.
Figure 9. Input Reflected Ripple Current Test Setup.
Note: Use a 1.0 µF ceramic capacitor and a 10 µF aluminum or
tantalum capacitor. Scope measurement should be made
using a BNC socket. Position the load between
51 mm and 76 mm (2 in. and 3 in.) from the module.
Figure 10. Output Ripple and Noise Test Setup.
LOAD
CONTACT AND
SUPPLY
I
I
CONTACT
V
I
(+)
V
I
(–)
V
O1
DISTRIBUTION LOSSES
RESISTANCE
I
O
V
O2
Note: All measurements are taken at the module terminals.
When socketing, place Kelvin connections at module terminals
to avoid measurement errors due to socket contact resistance.
Figure 11. Ou tput Voltage and Efficiency Te st Setup .
Design Considerations
Input Source Impedance
The power module should be connected to a low
ac-impedance source. A highly inductive source
impedance can affect the stability of the power module.
For the test configuration in Figure 9, a 100μF
electrolytic capacitor (ESR<0.7 at 100kHz), mounted
close to the power module helps ensure the stability of
the unit. Consult the factory for further application
guidelines.
Safety Considerations
For safety-agency approval of the system in which the
power module is used, the power module must be
installed in compliance with the spacing and separation
requirements of the end-use safety agency standard,
i.e., UL 1950, CSA C22.2 No. 60950-00, and VDE
0805:2001-12 (IEC60950 3rd Ed).
If the input source is non-SELV (ELV or a hazardous
voltage greater than 60 Vdc and less than or equal to
75Vdc), for the module’s output to be considered as
meeting the requirements for safety extra-low voltage
(SELV), all of the following must be true:
The input source is to be provided with reinforced
insulation from any other hazardous voltages,
including the ac mains.
One VIN pin and one VOUT pin are to be grounded, or
both the input and output pins are to be kept
floating.
The input pins of the module are not operator
accessible.
Another SELV reliability test is conducted on the
whole system (combination of supply source and
subject module), as required by the safety agencies,
to verify that under a single fault, hazardous
voltages do not appear at the module’s output.
Note: Do not ground either of the input pins of the
module without grounding one of the output pins.
This may allow a non-SELV voltage to appear
between the output pins and ground.
The power module has extra-low voltage (ELV) outputs
when all inputs are ELV.
The input to these units is to be provided with a
maximum 15 A fast-acting (or time-delay) fuse in the
unearthed lead.
Data Sh ee t
Januar
y
26, 2011 QBK020A Series Power Modules; DC-DC Converters
36
–
55
V
dc In
p
ut; 12Vdc Out
p
ut; 20A Out
p
ut Current
LINEAGE POWER 9
Feature Descriptions
Overcurrent Protection
To provide protection in a fault output overload condition,
the module is equipped with internal current-limiting
circuitry and can endure current limiting for a few mili-
seconds. If the overcurrent condition persists beyond a
few milliseconds, the module will shut down and remain
latched off. The overcurrent latch is reset by either
cycling the input power or by toggling the on/off pin for
one second. If the output overload condition still exists
when the module restarts, it will shut down again. This
operation will continue indefinitely until the overcurrent
condition is corrected.
An auto-restart option is also available. An auto-restart
feature continually attempts to restore the operation until
fault condition is cleared.
Remote On/Off
Two remote on/off options are available. Positive logic
remote on/off turns the module on during a logic-high
voltage on the ON/OFF pin, and off during a logic low.
Negative logic remote on/off turns the module off during
a logic high and on during a logic low. Negative logic,
device code suffix "1," is the factory-preferred
configuration. The on/off circuit is powered from an
internal bias supply. To turn the power module on and
off, the user must supply a switch to control the voltage
between the on/off terminal and the Vi (-) terminal
(Von/off). The switch can be an open collector or
equivalent (see Figure 12). A logic low is Von/off = 0.0V
to 0.8V. The typical Ion/off during a logic low is 10 µA.
The switch should maintain a logic-low voltage while
sinking 10µA. During a logic high, the maximum Von/off
generated by the power module is 5.0V. The maximum
allowable leakage current of the switch at Von/off = 2.0V
is 6.0µA. If using an external voltage source, the
maximum voltage V on/off on the pin is 14.0V with
respect to the Vi (-) terminal. If not using the remote
on/off feature, perform one of the following to turn the
unit on:
For negative logic, short ON/OFF pin to VI(-).
For positive logic: leave ON/OFF pin open.
V
O
(+)
V
O
(–)
V
I
(–)
+
–
I
on/off
ON/OFF
V
I
(+)
LOA
D
V
on/off
Figure 12. Remote On/Off Implementation.
Outp ut Overvoltage Cl amp
The output overvoltage clamp consists of a control
circuit, independent of the primary regulation loop, that
monitors the voltage on the output terminals and clamps
the voltage when it exceeds the overvoltage set point.
The control loop of the clamp has a higher voltage set
point than the primary loop. This provides a redundant
voltage control that reduces the risk of output
overvoltage.
Overt e m p eratu re Pr o tectio n
These modules feature an overtemperature protection
circuit to safeguard against thermal damage. The circuit
shuts down and latches off the module when the
maximum device reference temperature is exceeded.
The module can be restarted by cycling the dc input
power for at least one second or by toggling the remote
on/off signal for at least one second.
Input Under/Over voltage Lockout
At input voltages above or below the input under/over
voltage lockout limits, module operation is disabled. The
module will begin to operate when the input voltage level
changes to within the under and overvoltage lockout
limits.
Data Sheet
Januar
y
26, 2011 QBK020A Series Power Modules; DC-DC Convert ers
36
–
55
V
dc In
p
ut; 12Vdc Out
p
ut; 20A Out
p
ut Current
10 LINEAGE POWER
Feature Description (continued)
Forced Load Sharing (Parallel Operation with –
P option)
For additional power requirements, the power module
can be configured for parallel operation with active load
current sharing. Good layout techniques should be
observed for noise immunity when using multiple
modules in parallel. To implement active load sharing,
the following recommendations must be followed:
The parallel pins of all units in parallel must be
connected together. The path of these connections
should be as direct as possible, but should not pass
beneath the perimeter of the module body, except
immediately adjacent to the parallel pin location.
Parallel modules must use the same 48V source.
The VIN (-) input pin is the return path for the active
current share signal of the parallel pin. Separate
48V sources will prevent the active current share
return signal from being connected to other
modules.
The VIN (-) input connection should never be
disconnected from any of the parallel modules, while
another of the parallel modules is operating, unless
the VIN (+) pin, or the parallel pin is also
disconnected. The VIN (-) input provides the internal
logic ground and for the module’s primary circuits,
including the active current share circuit; and there
are sneak paths through the module’s internal
control ICs, when the VIN (-) pin is disconnected
(allowing the internal logic circuit to float), while the
parallel pin and VIN (+) pin are connected to other
operating modules. These sneak paths do not cause
permanent damage, but do create false conditions
that can affect the module’s internal logic
configuration.
The on/off pins of all modules should also be tied
together to the same external control circuitry, so
that the modules are turned on and off at the same
time, unless all parallel modules’ on/off pins are tied
to the input pins for automatic start upon application
of input voltage.
When modules in parallel applications contain the
auto-restart (4) option, it is required that the total
maximum load current value be less than 90% of [n-
1] times the individual module output current rating,
where n is the number of modules in parallel. For
example, if the application is using three modules
rated at 20A, then the maximum total load shall be
less than 0.9 x (3-1) x 20A = 0.9 x 2 x 20A = 36A.
This insures that a single module can shutdown
without causing the total load to exceed the
capability of the remaining operating module(s). The
shutdown module can then automatically restart,
and assume its share of the total load.
In all parallel applications (including applications
meeting the [n-1] sizing criteria discussed earlier), if
it is expected that a protective shutdown event could
cause more than one parallel module to shutdown
(for example, over temperature due to a common
fan failure, or gross over current affecting two or
more modules simultaneously), then the use of the
auto-restart (4) option is not recommended. The
auto-restart interval of these modules is not
synchronized to other modules, nor is it precise.
There will not be a successful restart following
multiple module shutdowns, because the individual
module’s restart timings will be different. There will
not be sufficient module capacity to prevent the first
module which restarts from experiencing an over
current, and then again shutting down before the
slowest module has restarted. Meanwhile, the
slowest module will then restart, and then shutdown
during the interval the fastest module is waiting for
its next restart. And so on and so on. In these
cases, only latching shutdown modules should be
used; and either toggling the Vin source or the on/off
pin to simultaneously restart the modules, following
a shutdown, is advised.
When not using the parallel feature, leave the share pin
open.
Data Sh ee t
Januar
y
26, 2011 QBK020A Series Power Modules; DC-DC Converters
36
–
55
V
dc In
p
ut; 12Vdc Out
p
ut; 20A Out
p
ut Current
LINEAGE POWER 11
Thermal Considerations
The power modules operate in a variety of thermal
environments and sufficient cooling should be provided
to help ensure reliable operation.
Thermal considerations include ambient temperature,
airflow, module power dissipation, and the need for
increased reliability. A reduction in the operating
temperature of the module will result in an increase in
reliability. The thermal data presented here is based on
physical measurements taken in a wind tunnel.
Heat-dissipating components are mounted on the top
side of the module. Heat is removed by conduction,
convection and radiation to the surrounding environment.
Proper cooling can be verified by measuring the thermal
reference temperature (TH). Peak temperature (TH)
occurs at the position indicated in Figure 13. For reliable
operation this temperature should not exceed the listed
temperature threshold.
15.7
(.62)
TH
23.6
(.93)
Figure 13. Location of the thermal reference
temperature TH.
The output power of the module should not exceed the
rated power for the module as listed in the Ordering
Information table.
Although the maximum TH temperature of the power
modules is 110 °C - 115 °C, you can limit this
temperature to a lower value for extremely high
reliability.
Heat Transfer via Convection
Increased airflow over the module enhances the heat
transfer via convection. The thermal derating figures
(14-16) show the maximum output current that can be
delivered by each module in the respective orientation
without exceeding the maximum TH temperature versus
local ambient temperature (TA) for air flows of 1 m/s (200
ft./min), 2 m/s (400 ft./min) and 3 m/s (600 ft./min).
The use of Figures 14 - 15 are shown in the following
example:
Example
What is the minimum airflow necessary for a
QBK020A0B operating at VI = 48 V, an output current of
8A, and a maximum ambient temperature of 70 °C in
transverse orientation.
Solution:
Given: VI = 48V, Io = 8A, TA = 70 °C
Determine required airflow (V) (Use Figure 14):
V = 1.0 m/sec. ( 200 ft./min.) or greater.
OUTPUT CURRENT, IO (A)
0.0
4.0
8.0
12.0
16.0
20.0
24.0
15 25 35 45 55 65 75 85 95
1.0 m/s (200 ft./min.)
2.0 m/s (400 ft./min.)
3.0 m/s (600 ft./min.)
LOCAL AMBIENT TEMPERATURE, TA (C)
Figure 14. Output Curren t Derating for the
QBK020A0B in the Transverse Orientation; Airflow
Direction from Vin(+) to Vin(-); Vin = 48V.
OUTPUT CURRENT, IO (A)
0.0
4.0
8.0
12.0
16.0
20.0
24.0
15 25 35 45 55 65 75 85 95
1.0 m/ s ( 2 0 0 f t ./ min.)
2.0 m/s (400 ft./min.)
3.0 m/s (600 ft./min.)
LOCAL AMBIENT TEMPERATURE, TA (C)
Figure 15. Output Curren t Derating for the
QBK020A0B (Vo = 12V) in the Transverse
Orientation w ith base plate; Airflow Direction from
Vin(+) to Vin(–); Vin = 48V.
Data Sheet
Januar
y
26, 2011 QBK020A Series Power Modules; DC-DC Convert ers
36
–
55
V
dc In
p
ut; 12Vdc Out
p
ut; 20A Out
p
ut Current
12 LINEAGE POWER
Please refer to the Application Note “Thermal
Characterization Process For Open-Frame Board-
Mounted Power Modules” for a detailed discussion of
thermal aspects including maximum device
temperatures.
Layout Considerations
The QBK020 power module series are low profile in
order to be used in fine pitch system card architectures.
As such, component clearance between the bottom of
the power module and the mounting board is limited.
Avoid placing copper areas on the outer layer directly
underneath the power module. Also avoid placing via
interconnects underneath the power module.
For additional layout guide-lines, refer to FLTR100V10
data sheet.
Through-Hole Lead-Free Soldering
Information
The RoHS-compliant through-hole products use the
SAC (Sn/Ag/Cu) Pb-free solder and RoHS-compliant
components. They are designed to be processed
through single or dual wave soldering machines. The
pins have an RoHS-compliant finish that is compatible
with both Pb and Pb-free wave soldering processes. A
maximum preheat rate of 3C/s is suggested. The wave
preheat process should be such that the temperature of
the power module board is kept below 210C. For Pb
solder, the recommended pot temperature is 260C,
while the Pb-free solder pot is 270C max. Not all
RoHS-compliant through-hole products can be
processed with paste-through-hole Pb or Pb-free reflow
process. If additional information is needed, please
consult with your Lineage Power representative for
more details.
Post Solder Cleaning and Drying
Considerations
Post solder cleaning is usually the final circuit-board
assembly process prior to electrical board testing. The
result of inadequate cleaning and drying can affect both
the reliability of a power module and the testability of the
finished circuit-board assembly. For guidance on
appropriate soldering, cleaning and drying procedures,
refer to Lineage Power Board
Mounted Pow er Module s : Sold ering a nd Clean in g
Application Note (AP01-056EPS).
OUTPUT CURRENT, IO (A)
0.0
4.0
8.0
12.0
16.0
20.0
24.0
15 25 35 45 55 65 75 85 95
1.0 m/s (200 ft./min.)
2.0 m/s (400 ft./min.)
3.0 m/s (600 ft./min.)
LOCAL AMBIENT TEMPERATURE, TA (C)
Figure 16. Output Cu rrent Derating for the
QBK020A0B (Vo = 12V) in the Transverse Orientation
with baseplate and 0.25-inch high heatsink; Airflow
Direction from Vin(+) to Vin(–); Vin = 48V.
OUTPUT CURRENT, IO (A)
0.0
4.0
8.0
12.0
16.0
20.0
24.0
15 25 35 45 55 65 75 85 95
1.0 m/ s ( 2 0 0 f t ./ min.)
2.0 m/s (400 ft./min.)
3.0 m/s (600 ft./min.)
LOCAL AMBIENT TEMPERATURE, TA (C)
Figure 17. Output Cu rrent Derating for the
QBK020A0B (Vo = 12V) in the Transverse Orientation
with baseplate and 0.5-inch high heatsink; Airflow
Direction from Vin(+) to Vin(–); Vin = 48V.
Data Sh ee t
Januar
y
26, 2011 QBK020A Series Power Modules; DC-DC Converters
36
–
55
V
dc In
p
ut; 12Vdc Out
p
ut; 20A Out
p
ut Current
LINEAGE POWER 13
Mechanical Outline for QBK020A0B Through-hole Module
Dimensions are in millimeters and (inches).
Tolerances: x.x mm 0.5 mm ( x.xx in. 0.02 in.) [unless otherwise indicated]
x.xx mm 0.25 mm ( x.xxx in 0.010 in.)
TOP
VIEW
SIDE
VIEW
BOTTOM
VIEW
36.8
(1.45)
57.9
(2.28)
4.6
(.18) MIN
1.57 (.062) DIA SOLDER PLATED
PIN SHOULDER, 5 PLCS
1.02 (.040) DIA SOLDER PLATED
PIN, 5 PLCS
0.25
(.010)MIN
10.5
(0.41)
2.36 (.093) DIA SOLDER-PLATED
PIN SHOULDER, 2 PLCS
1.57 (.062) DIA SOLDER-PLATED
PIN, 2 PLCS
3.6
(.14)
7.62
(.300) 3.81
(.150)
11.43
(.450)
15.24
(.600)
VI(-)
VI(+)
ON/OFF
50.8
(2.000)
10.8
(.43)
15.24
(.600)
VO(-)
VO(+)
*Top side label includes Lineage Power name, product designation, and data code.
†Option Feature, pin is not present unless one these options specified.
Data Sheet
Januar
y
26, 2011 QBK020A Series Power Modules; DC-DC Convert ers
36
–
55
V
dc In
p
ut; 12Vdc Out
p
ut; 20A Out
p
ut Current
14 LINEAGE POWER
Mechanical Outline for QBK –H (Baseplate version) Through-hole Module
Dimensions are in millimeters and (inches).
Tolerances: x.x mm 0.5 mm ( x.xx in. 0.02 in.) [unless otherwise indicated]
x.xx mm 0.25 mm ( x.xxx in 0.010 in.)
TOP
VIEW
SIDE
VIEW
BOTTOM
VIEW
36.8
(1.45)
57.9
(2.28)
4.6
(.18)MIN
1.57 (.062) DIA SOLDER PLATED
PIN SHOULDER, 5 PLCS
1.02 (.040) DIA SOLDER PLATED
PIN, 5 PLCS
0.25
(.010)MIN
10.5
(0.41)
2.36 (.093) DIA SOLDER-PLATED
PIN SHOULDER, 2 PLCS
1.57 (.062) DIA SOLDER-PLATED
PIN, 2 PLCS
3.6
(.14)
7.62
(.300) 3.81
(.150)
11.43
(.450)
15.24
(.600)
VI(-)
VI(+)
ON/OFF
10.8
(.43)
15.24
(.600)
VO(-)
VO(+)
26.16
(1.030)
5.3
(.21)
5.3
(.21)
47.24
(1.860)
M3X 0.5 THREADED
MOUNTING HOLES
MAX SCREW TORQUE
0.56 N·M (5 IN·LB)
3.0 (0.12) MAX
SCREW PROTRUSION
50.80
(2.000)
*Bottom side label includes Lineage Power name, product designation, and data code.
†Option Feature, pin is not present unless one of these options is specified.
Data Sh ee t
Januar
y
26, 2011 QBK020A Series Power Modules; DC-DC Converters
36
–
55
V
dc In
p
ut; 12Vdc Out
p
ut; 20A Out
p
ut Current
LINEAGE POWER 15
Recommended Pad Layout for Through-Hole Modules
Dimensions are in millimeters and (inches).
Tolerances: x.x mm 0.5 mm ( x.xx in. 0.02 in.) [unless otherwise indicated]
x.xx mm 0.25 mm ( x.xxx in 0.010 in.)
50.80
(2.000)
Vo (+)
Vo (-)
15.24
(.600)
VI(+)
VI (-)
†
†
ON/OFF
3.6
(.14)
10.8
(.43)
57.9
(2.28)
36.8
(1.45)
1.02 (.040) DIA PIN, 5 PLCS
1.57 (.062) DIA PIN, 2 PLCS
CASE
PARALLEL
3.81
(.150)
7.62
(.300)
11.43
(.450)
15.24
(.600)
†Option Feature, pin is not present unless one of these options is specified.
Data Sheet
Januar
y
26, 2011 QBK020A Series Power Modules; DC-DC Convert ers
36
–
55
V
dc In
p
ut; 12Vdc Out
p
ut; 20A Out
p
ut Current
This product is affected by a Permanent Injunction entered by the United States District
Court for the Eastern District of Texas, Marshall Division in Civil Action No. 2:07-cv-00497-
TJW-CE (copy enclosed). As set forth in that Order, certain acts associated with this product
are prohibited. This Product is Not for Sale in, Use in, or Importation into the United States.
Document No: DS03-077 ver. 1.46
PDF Name: QBK020A0B.pdf
Ordering Information
Please contact your Lineage Power Sales Representative for pricing, availability and optional features.
Table 1. Device Codes
Input Voltage Output
Voltage Output
Current Efficiency Connector
Type Product codes Comcodes
48V (36-55Vdc) 12V 20A 94% Through hole QBK020A0B1 108985656
48V (36-55Vdc) 12V 20A 94% Through hole QBK020A0B1Z CC109107876
-Z Indicates RoHS compliant modules
Table 2. Device Options Option Suffix
Negative remote on/off logic 1
Auto-restart 4
Pin length 3.68 0.25mm (0.145 0.010 in.) 6
Case ground pin (offered with baseplate option only) 7
Base Plate option -H
Active load sharing (Parallel Operation) -P
RoHS Compliant Z
Note: Legacy device codes may contain a –B option suffix to indicate 100% factory Hi-Pot tested to the isolation voltage specified in
the Absolute Maximum Ratings table. The 100% Hi-Pot test is now applied to all device codes, with or without the –B option suffix.
Existing comcodes for devices with the –B suffix are still valid; however, no new comcodes for devices containing the –B suffix will
be created.
World Wide Headquarters
Lineage Power Corporation
601 Shiloh Road, Plano, TX 75074, USA
+1-888-LINE AGE(546-3243)
(Outside U.S.A.: +1-972-244-WATT(9288))
www.lineagepower.com
e-mail: techsupport1@lineagepower.com
Asia-Pacific Headquarters
Tel: +86.021.54279977*808
Europe, Middle-East and Africa Headqu ar te rs
Tel: +49.89.878067-280
India Headquarters
Tel: +91.80.28411633
Lineage Power reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or
a
pplication. No rights under any patent accompany the sale of any such product(s) or information.
Lineage Power DC-DC products are protected under various patents. Information on these patents is available at www.lineagepower.com/patents.
©
2010 Lineage Power Corporation, (Plano, Texas) All International Rights Reserved.